WilliamCourtenay, 9th Earl of Devon was born on 30 July 1768.1 He was the son of WilliamCourtenay, 2nd Viscount Courtenay of Powderham Castle and FrancesClack.1 He was baptised on 30 August 1768. He died on 26 May 1835 at age 66 at Paris, FranceG, unmarried.1 He was buried on 12 June 1835. He succeeded as the 3rd Viscount Courtenay of Powderham Castle, co. Devon [G.B., 1762] on 14 October 1788.1 He succeeded as the 5th Baronet Courtenay [E., 1645] on 14 October 1788.1 He succeeded as the 9th Earl of Devon [E., 1553] on 15 March 1831, after the House of Lords declared his right to the Earldom.1 On his death, the Viscountancy Courtenay of Powderham Castle became extinct.1